But the First Amendment protects against the Government; it does not leave us at the mercy of noblesse oblige. We would not uphold an unconstitutional statute merely because the Government promised to use it responsibly. [...] The Government’s assurance that it will apply [a statutory provision] more restrictively than its language provides is pertinent only as an implicit acknowledgment of the potential constitutional problems with a more natural reading.

Alternatively, the Government proposes that law enforcement agencies "develop protocols to address" concerns raised by cloud computing. Probably a good idea, but the Founders did not fight a revolution to gain the right to government agency protocols.